With hindsight, v0.15 and v0.16 were trash. Fixed.

Fix some horrible bugs (see RELEASENOTES.md)

`tag` checks in all repositories, that a tag does not exist. Remove some fluff from regular output. Fix a bug involving settings copy (build_ignore became a directory bug) Executed commands are now prefixed with ==> for better readability. Always redo bootstrap.auto folder on fetch, which means that you don't need to clean dist anymore after editing .bootstrap files. Forgot to write-protect dependencies, when only partial builds were done.